Plasmid

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Plasmids are [[Supercoiled|supercoiled]] [[DNA|DNA]] molecules present in most species of [[Bacteria|bacteria]]. These are not integrated into the host [[Chromosome|chromosome]] and are much smaller in length.  
 
Plasmids are [[Supercoiled|supercoiled]] [[DNA|DNA]] molecules present in most species of [[Bacteria|bacteria]]. These are not integrated into the host [[Chromosome|chromosome]] and are much smaller in length.  
  
Plasmids are not necessary for the survival of a [[Bacteria|bacteria]] but can contain [[Gene|genes]] that are advantageous in changing environmental conditions, an example would be [[Antibiotic resistance|antibiotic resistance]][[Gene|genes]]&nbsp;<ref>Maloy &lt;i&gt;et al.&lt;/i&gt;, (1987), Microbial Genetics, 2nd edition, Jones and Bartlett Publishers.</ref>.
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Plasmids are not necessary for the survival of a [[Bacteria|bacteria]] but can contain [[Gene|genes]] that are advantageous in changing environmental conditions, an example would be [[Antibiotic resistance|antibiotic resistance]][[Gene|genes]]&nbsp;<ref>Maloy <i>et al.</i>, (1987), Microbial Genetics, 2nd edition, Jones and Bartlett Publishers.</ref>.  
  
 
Plasmids have no replication machinery of their own and are reliant upon the host for duplication.  
 
Plasmids have no replication machinery of their own and are reliant upon the host for duplication.  

Revision as of 16:04, 14 November 2011

Plasmids are supercoiled DNA molecules present in most species of bacteria. These are not integrated into the host chromosome and are much smaller in length.

Plasmids are not necessary for the survival of a bacteria but can contain genes that are advantageous in changing environmental conditions, an example would be antibiotic resistancegenes [1].

Plasmids have no replication machinery of their own and are reliant upon the host for duplication.

References

  1. Maloy et al., (1987), Microbial Genetics, 2nd edition, Jones and Bartlett Publishers.

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